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8 SheetsSheet 1.

(No Model.)

1 J. BRANDNER.

COUPLING No. 463,301. Patented Nov. 17, 1891.

(No Model.) 8 sums-sh et 2.

J. BRANDNER.

COUPLING. No. 463,301. Patented Nov. 17, 1891.

1.1 11 I l m VII-"IN (No Model.)

8 Sheets-Sheet 41 J. BRANDNER.-

- COUPLING.

Patented Nov. 17, 1891.

"1 1m T- 1 13; 5' A. 5

(No Model.) 8 Sheets-Sheet 5. J. BRANDNER.

COUPLING.

No. 463,301. Patented Nov. 17, 1891.

(No Model.) 8 Shets-Sheet 6. J. BRANDNER'.

COUPLING. I No. 463,301. Patented Nov. 17, 1891.

i 1Y3 'r u may ma mums puns co., mum-Lurke WASHINGYON, n. c.

(No Model.) 8 Sheets-Sheet 7. J. BRANDNER.

COUPLING.

No. 463,301. 4 Patented Nov. 1-7, 1891.

(No Model.) s Sheets-Sheet 8.. J. BRANDNER.

COUPLING Patented Nov. 17,1891.

wi'ar MM Rs co., mow-mac, WASHINGTON n c fication.

NlTED STATES.

PATENT OFFICE.

JOHANN BRANDNER, OF REGENSBURG, GERMANY.

COUPLING.

SPECIFICATION forming part of Letters Patent No. 463,301, dated November 17, 1891.

Application filed May 8, 1889.

To all whont it may concern.-

Be it known that I, J OHANN BRANDNER, a subject of the King of Bavaria, residing at Regensburg, in theKingdom of Bavaria, Germany, have invented a new and useful Improvement in Couplings, of which the following is a specification.

This invention relates to an improved coupling consisting of a divided nut that maybe opened or closed to release or hold an inclosed shaft, screw, or spindle.

The invention consists in the various features of improvement more fully pointed out in the claims.

In the accompanying drawings, Figures 1 to 6 are face views of my improved coupling, showing its jaws in different positions. Figs. 7 and 8 are face views of a modification, showing the jaws in different positions. Fig. 9 is a sectional side view of a vise provided with my improvement. Fig. 10 is a top view thereof. Figs. 11 and 12 are sectional end views of Fig. 9, showing the coupling respectively closed and opened. Fig. 13 isa longitudinal section of a modification of my improved coupling. Fig. 1 1 is aface view of another modification, showing it closed. Figs. 15 and 16 are simi- 'lar views of this modification, showing the coupling partly and completely open. Figs.

17 and 18 are face views and end views, respectively, of the hand-lever used in this modi- Fig. 19 is an outer face view of a disk used in lieu of the lever shown in Figs. 17 and 18. Figs. 20, 21,-and 22 are inner face views and end views thereof, respectively. Fig. 23 is a longitudinal section, partly in side View, of a pair of shafts connected by my improved coupling, showing the same closed. Fig. 24 is a top view thereof. Fig. 25 is a sectional end View thereof; Fig. 26, a similar view,

showing the coupling open; Fig. 27, a sectional side view thereof, showing the coupling open; Fig. 28, a top view thereof, with the coupling open; Fig. 29, alongitudinal section of apumprod provided with my improved coupling.

, Figs. and 31 are sectional end views thereof,

showing it respectively closed and open. Fig. 32 is a view of the parts similar to Fig. 3; Fig. 33, an edge View thereof; Fig. 34, a section on line M M, Fig. 32; Fig. 35, a view of the parts similar to Fig. 8; Fig. 36, an edge Serial No. 309,997. (No model.)

to that shown in Fig. 29; Fig. 12, a longitudinal section on line P P, Fig. 41; and Fig. 43, a section on line 0 0, Fig. 4.1.

Vith particular reference to Figs. 1 to 6, the letter B represents an annular plate, to

one face of which are pivoted the jaws A O.

The pivots a b of these jaws are placed upon opposite sides of any diameter that can be drawn across plate B, as indicated by dotted diameter N N, Fig. 1. The jaw O is provided with an arm or lever h, which has a tendency, when the jaws are closed, to stand by its own gravity in the downwardly-inclined position shown in Fig. 1. I

The jaw A has the straight edges cl and f placed opposite corresponding straight edges d andf on jaw C. At the center the jaws are cut away, each in a -'se1nicircnlar line. Here they inclose a shaft or screw D.

The operation of the device is as follows: If the lever h is raised, the jaw C will turn on pivot 11. The outer end or point of edge cl will bear against edge d, Fig. 2, and thus j awA will be made to turn around pivot a. In this way the jaws will be gradually made to recede from each other to liberate the spindle D. In use in the two extreme positions, Figs. 1 and 1, the edges (Z cl f f will stand parallel to each other, while in the intervening positions the edges of one jaw will be inclined toward the edges of the other jaw, Figs. 2, 3, 5, and 6. If the lever 72- is permittedto fall back, the edge f will press upon outer point of edge f, and thus the jaws will be turned on their pivots until they resume their closed position, Fig. 1. The inner semicircular edge of the jaws should be threaded, so that the entire device constitutes a sectional nut, which may be made to grasp or release the inclosed screw. The weight of lever It serves to prevent spontaneous opening of the jaws.

In Figs. 7 and 8 the jaws A G are likewise pivoted to an annular disk B; but the opening and closing of the jaws A C does not depend entirely upon contact between their IOO edges. In this modification theopening and closing are effected by a ring E, provided with the lever h and free to turn concentrically with spindle D. The jaws A have curved edges m, that are engaged by pins a, secured to ring E. If the lever 71' is vibrated to the right, (dotted line, Fig. 7,) the action of pins n against curved edges on will cause the jaws A G to recede fromone another as they are turned on their pivots until they assume the position shown in Fig. 8. A reverse motion of lever h causes the jaws to close against v engaging projections e on disk 13.

5 acting against the edges of the jaws with each other, and the pins 02, hearing against edges m, will prevent spontaneous opening. In the same way the jaws are prevented when open from closing upon one another as long as the ring E is not moved.

Figs. 9 to 12 show the invention applied to a vise having the usual clamping-jaws G G. The jaws A C are again pivoted to an annular back plate B, which is secured to the movable jaw of the vise. G is secured to arm II, which, by means of my improved coupling, can be connected with or disconnected from the screw-spindle D. When the coupling is opened, the movable jaw may be slid outward to any desired distance, after which the coupling is closed, so that the movable jaw may be drawn up tight. In these figures, as in Figs. 7 and 8, A O are the two coupling-jaws turning on pivots a b, respectively. E is the concentric ring secured to the arm H and provided with the pins 01., that engage the curved edges m of jaws A O. h is the lever that operates the coupling.

, In Fig.13 the pivots abare dispensed with,

the jaws A 0 being provided with noses Z, Thus the parts 6 Z constitute fulcrums for the jaws to turn on. Springs serve to draw the jaws together, so as to interlock with spindle D.

In Figs. let to 18 the jaws AGare provided with eccentric rails 19, engaged by a double pair of pins 0 on hand-lever L. These pins move concentrically with the screw-spindle. The rails enter between each pair of pins 0 o, and the jaws A0 are by them turned on their pivots a b, so as to open or close. The closing of the jaws may be aided by springs is,

their free ends and attached to the disk 13 with their fixed ends.

In Figs. 19 to 22 the disk K revolves by handles J, has only single teeth 1', adapted to act against the inner edge of the rails 1). (Shown in Figs. 14: and 16.) Here the closing of the jaws is entirely effected by the springs 7t. This construction, as well as that shown in Figs. 7 and S, is particularly applicable to couplings used for the transmission of power, as represented in Figs. 23 to 28. Upon the driving-shaft g iskeyed the disk E, to which the jaws A and C are pivoted by the bolts a .b. The jaws are adapted to engage the screw- The movable j aw threaded end F of a sliding shaft i. 70 is the spring for closing the jaws. By revolving the driving-shaft g the shaft "L is gradually drawn into the coupling against disk E, and finally participates in the revolution of the driving-shaft. The j awsare provided with the projections m, engaged by rail 19 on a shifting-lever M that encircles the jaws. \Vhen the coupling is closed upon the screw F, Figs. 23 and 25, the parts 29 m are out of contact and the jaws A G are "pressed together by springs 70.

When the coupling is open, Figs. 26 and 28, the rails p engage projections m and hold the jaws apart. A lever N serves for moving the shaft 2'.

The coupling may be so constructed that the jaws A O carry the eccentric rails 19', while the shifting-lever carries the projections. The jaws may also, if desired, be provided with cam-shaped curves at the center in lieu of carrying the screw-thread. This enables the jaws to grasp the inclosed shaft by friction, and thus the second lever is rendered unnecessary. This arrangement is shown applied to a pump-rod in Figs. 29 to 31. Here the piston-rod D carries the ring E, to which are pivoted by bolts a b the jaws A O. The bolts connect the jaws A O to the ring E in the manner already described, so that the jaws are free to turn on the ring. The ring E is moreover provided with the pins n for engaging the curved edges m of the jaws. The draw-rod D is provided with a groove D, into which the jaws A G bite. The rod D may be secured to the piston-rod D by turning lever h of ring E.

In Figs. 41 to 43 the fixed part or disk B constitutes the piston of the pump, while the spindle D constitutes the pump-rod. This rod is notched, as at s, for the engagementof the pivoted jaws A C. These jaws are protected by a collar B which is connected to the disk 13 by the same bolts a b, that connect the jaws to the disk.

hat I claim is- 1. The combination of an annular disk with a pair of interdependent simultaneously-oscillating jaws A O, pivoted thereto, the jaws being cut out at the center and provided with contact-edges adapted to operate against one another, substantially as specified.

2. The combination of an annular disk with a pair of interdependentsimultaneously-oscillating jaws pivoted thereto and provided with contact-edges and with a spring for pressing the jaws together, substantially as specified.

3. The combination of an annular disk having pins n with interdependent simultaneously-oscillating jaws A C, pivoted thereto, and having curved edges m, adapted to be engaged by pins 42, substantially as specified.

at. The combination of an annular disk with a pair of jaws pivoted thereto and provided with eccentric rail 12 and with a hand-lever In testimony whereof I 'have signed my provided with pins adapted to engage said name to this specification 1n the presence of 10 rails, substantially as specified. two subscribing witnesses.

5. The combination of an annular disk hava 5 ing projections e with a pair of interdepend- JOHANN BRANDNER.

ent simultaneouslyoscillating jaws A 0, pro- Vitnesses: vided with noses Z, that engage said projec- ADOLF HAOUSSER,

tions, substantially as specified. WM. ESSENWEIN. 

